package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.mapper.DishMapper;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.SetmeatDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceIpml implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmeatDishMapper setmeatDishMapper;

    @Autowired
    private SetmealMapper setmealMapper;

    /*
    * 新增擦菜品实现类
    * */
    @Transactional
    public void saceWithFlavor(DishDTO dishDTO) {
        // 向菜品表插入一条数据
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.insert(dish);

        // 获取insert 语句的主键
        Long dishId= dish.getId();

        // 向口味表插入多条数据

        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            dishDTO.getFlavors().forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            dishFlavorMapper.insertBatch(flavors);
        }

    }

    /*
    * 分页查询菜品*/

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page=dishMapper.pageQuery(dishPageQueryDTO);

        return new PageResult(page.getTotal(),page.getResult());
    }




    /*
    * 批量处理菜品接口删除的实现类
    * */
    @Transactional
    public void deleteBatch(List<Long> ids) {
        ids.forEach(id -> {
            Dish dish=dishMapper.getById(id);
            // 判断当前要删除的菜品状态受否起售状态
            if(dish.getStatus()== StatusConstant.ENABLE){
                // 如果启动状态，则不能删除爬出
                throw new RuntimeException(MessageConstant.DISH_ON_SALE);

            }
        });
        // 判断当前的菜品是否内被套餐关联
        List<Long> setmeatIds =setmeatDishMapper.getSetmealIdByDishId(ids);
        if(setmeatIds!=null&&setmeatIds.size()>0){
            // 如果关联了，抛出业务异常
            throw new RuntimeException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        // 删除菜品表中的数据
        ids.forEach(id->{
            dishMapper.deleteById(id);
            // 删除菜品和口味的关联数据
            dishFlavorMapper.deleteByDishId(id);

        });
    }


    /*
    * 根基id查询菜品和口味的id
    * */
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        // 查询菜品表
        Dish dish = dishMapper.getById(id);
        // 查询口味表
        List<DishFlavor> dishFlavorList= dishFlavorMapper.getByDishId(id);
        // 将查询到的数据封装到dishDTO中
        DishVO dishVO = new DishVO();

        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavorList);

        return dishVO;
    }


    /*
    * 根据id修改菜品相关的口味
    * */
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);

        // 修改菜品的dish ，执行update操作
        dishMapper.update(dish);

        // 删除口味表中当前菜品对应的所有口味数据，操作dish_flavor表,执行delete操作
        dishFlavorMapper.deleteByDishId(dishDTO.getId());

        // 添加当前提交过来的口味数据，操作dish_flavor表，执行insert操作
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors!=null&&flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.insertBatch(flavors);
        }

    }

    /*
    * 根据菜id完成启售停售
    * */
   @Transactional
    public void startOrStop(Integer status, Long id) {
        Dish dish = Dish.builder()
                .id(id)
                .status(status)
                .build();
        dishMapper.updata(dish);
        if(status==StatusConstant.DISABLE){
            // 如果是停售操作，还需要将包含当前菜品的套餐也停售
            List<Long> dishs = new ArrayList<>();
            dishs.add(id);
            // select setmeal_id from setmeal_dish where dish_id in (?,?,?)
            List<Long> setmealIds = setmeatDishMapper.getSetmealIdByDishId(dishs);
            if(setmealIds!=null&&setmealIds.size()>0){
               for(Long setmealId:setmealIds){
                   Setmeal setmeal = Setmeal.builder()
                           .id(setmealId)
                           .status(StatusConstant.DISABLE)
                           .build();
                   setmealMapper.update(setmeal);
               }
            }


        }

    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }




}
